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The atomic configuration and ductility of NiAl intermetallics affected by C impurity have been studied with a first-principles pseudo-potential method. The calculation results indicate that for the substitutional cases, C prefers to replace Ni other than Al in most of the cases except for the Ni-rich case. As compared with the interstitial cases, the C atom can be more easily occupy the Ni-rich octahedron...
125µm- breath sensor with high sensitivity and rapid response was prepared by using n-type Si: Au material. Its sensitivity coefficient and time constant were 4 V.sec/L and 38 msec, respectively. Its working principle was based on anomalous resistance effect, which not only increased the sensitivity, but also reduced its time constant greatly. Its signal processing system can select the breath signals...
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